Made a drag system to make the player to be able to hold materials, but it can get quite faulty at times and I can’t see the root of the problem.
(2.6 MB)
Problem 1:
Significant delay between the object dropping and the player releasing their left click.
Problem 2:
Clickly clicking the left click would for whatever reason not register it being released, meaning it still thinks the user is still holding their left click.
Problem 3:
When quickly grabbing and releasing an object, the player can practically tower up.
Problem 4:
As seen in the video, some parts can go out flying even when released.
client-side
local request = game.ReplicatedStorage.interactions.requestControl
local lplr = game.Players.LocalPlayer
local mouse = lplr:GetMouse()
local keyboard = game:GetService("UserInputService")
local solids = workspace.Instances.Solids
local focusDistance = 6
local grabbed : BasePart? = nil
local line : LinearVelocity
local sParams = RaycastParams.new()
sParams.FilterType = Enum.RaycastFilterType.Include
sParams.FilterDescendantsInstances = {solids}
local lasttarget = Vector3.zero
local function onDown()
local mouseray = workspace:Raycast(mouse.Origin.Position, mouse.Origin.LookVector * 50, sParams)
if mouseray then
if not grabbed then
local allowed = request:InvokeServer(mouseray.Instance)
if allowed then
line = mouseray.Instance.line
grabbed = mouseray.Instance
focusDistance = (mouse.Origin.Position - mouseray.Position).Magnitude
end
end
end
end
local function distanceRay()
local params = RaycastParams.new()
params.FilterType = Enum.RaycastFilterType.Exclude
params.FilterDescendantsInstances = {workspace.Instances, lplr.Character}
local ray = workspace:Raycast(mouse.Origin.Position, mouse.Origin.LookVector * (focusDistance + 0.1), params)
if ray then
return ray.Position
else
return mouse.Origin.Position + mouse.Origin.LookVector * focusDistance
end
end
local function onMove()
if grabbed and line then
lasttarget = distanceRay()
end
end
local function onUp()
if grabbed then
request:InvokeServer(grabbed)
grabbed = nil
lasttarget = Vector3.zero
end
end
mouse.Button1Down:Connect(onDown)
mouse.Button1Up:Connect(onUp)
mouse.Move:Connect(onMove)
workspace.CurrentCamera:GetPropertyChangedSignal("CFrame"):Connect(onMove)
mouse.WheelForward:Connect(function()
focusDistance = math.min(27, focusDistance + 1.5)
end)
mouse.WheelBackward:Connect(function()
focusDistance = math.max(3, focusDistance - 1.5)
end)
game["Run Service"].PreSimulation:Connect(function(dt)
if grabbed and line and lasttarget.Magnitude > 0.1 then
local origin : Vector3 = grabbed.Position
local direction = (lasttarget-origin).Unit
local distance = (origin-lasttarget).Magnitude
local magnitude = direction * (distance / dt * 0.075)
line.VectorVelocity = magnitude
end
if grabbed then
grabbed.AssemblyAngularVelocity = Vector3.zero
end
end)
Server-side
local fol = workspace.Instances.Solids
local rC = game.ReplicatedStorage.interactions.requestControl
local controlled = {}
rC.OnServerInvoke = function(plr, part)
print(plr.Name.." attempts to control/release a part!")
if controlled[plr] then
controlled[plr].Owner.Value = nil
controlled[plr]:SetNetworkOwner(nil)
controlled[plr] = nil
part.line.Enabled = false
part:ApplyImpulse(part.line.VectorVelocity*3)
part.CollisionGroup = "def"
return false
end
if part then
if part.Parent == fol then
if part.Owner.Value == nil then
part:SetNetworkOwner(plr)
part.Owner.Value = plr
part.line.Enabled = true
controlled[plr] = part
part.CollisionGroup = "cGroup"
return true
end
end
end
return false
end
Anatomy of a part that can be grabbed by the player:
The MP4 file has for whatever reason lost most of its framrate after conversion, here’s the original recording file: robloxapp-20240107-0853066.wmv (2.6 MB)
Are you sure that’s the right solution? All I found for DragDetectors is that they allow movement in x and z direction, but not y. So you can open doors etc. but not “pick up” something. How would you do that with the DragDetector? Like in all these examples Drag Detectors | Documentation - Roblox Creator Hub they are all dragged in x and y direction only.
It has, but I haven’t seen any features that would allow picking up stuff with it. ChatGPT also says:
The DragDetector in Roblox primarily detects dragging movements in the XZ plane. If you want the object to move in the Y-axis as well, you might need to resort to scripting to achieve that behavior.
This is not true, in this case ChatGPT was wrong, and in reality it literally has no limits with a 3D space (see here and here), in my opinion it’s just probably just not accurate with the camera changing.
As for sourcing AI in Roblox posts, you should either be using Google Bard or nothing IMO, since it’s the only public chatbot that is actually somewhat accurate when providing it with a link. ChatGPT is not meant to provide factual information, just talk like a human. Don’t get me wrong it, it does that very well and even better than Bard, but it’s just not reliable at all for sourcing information.
Hey, I’ve decided to fix the system with a better system (and i tested it ingame aswell, where it worked well).
A bit off-topic from original post, but how can I utilize my grab system for mobile users? For PC, I use a raycast @ the direction of the mouse, but since mobile users of course don’t have a mouse, I can just use taps.
However the simple nature that it would be less accurate to decide what part to select, do I use some other methods rather than raycasts? Possibly spherecasting? Or is there an existing solution for my problem?
& also @cakeycocoa
You’re right in a sense that they can be dragged in 3D, e.g. pulled with your character etc., but, as far as I know, you cannot control it in 3D. The mouse only goes left and right, up and down, there’s no factor that controls it in 3D. I also tried out different modes and played around. While I can confirm that you are sort of right, there’s still much scripting to be done to control something with the dragging feature in 3D.
Also @cakeycocoa I don’t just take what ChatGPT writes, of course I do my own research and test the output. So far it was a very great help though
But if you find a way to better control it in 3D, please let me know! I also tried to achieve that with as little scripting as possible and did not yet unfortunately.
I made a very simple but effective drag system a few months ago. You’re welcome to have a look at the code and see if there is anything you want to take
